The SEQ number indicates the relative number of bytes that have been transmitted in the session, including the bytes in the current segment. TCP uses the ACK number sent back to the source to indicate the next byte that the receiver expects to receive. This is called . Forecasting Data mining Expectational acknowledgement Windowing

Windowing

Explanation:

TCP is a protocol in the transport layer of the OSI and TCP/IP suite network models. It is a connection oriented protocol that creates an established connection between hosts before transmission. All data is accounted for as dropped packets are retransmitted.

It uses a three way hand shake to establish connection and sends packets in segments. Each maximum segment transfered is acknowledged and the next segment size of specified through this windowing process, allowing for an increase or decrease in window size depending on the bandwidth available on the link.

is this supposed to be a question ?

that without the operating systems you would have to control and synchronize computer hardware.